Wire-cutting mechanism



April 17, 1928.

A. A. GRISWOLD ET AL WIRE CUTTING MECHANISM Filed Oct. 22, 1924 2 Sheets-Shet 1 b QN * ZNVENIUHE :Afld/Mfl i 5 April 17. 1928. 1,666,134

A. A. GRISWOLD ET AL WIRE CUTTING MECHANISM Filed Oct. 22. 1924 2 Sheets-$heet 2 Fig W '9 1r ENTERS. i fim RTTUENE Y ,Patent e j A'p'r; 17, 1.9 8 p Q is I i 7 t UNITED. ST PATEN ALBERT ABBE GRISWOLD, or PROVIDENCE, RHODE ISLAND, AND ALVIN. cARRoLDeoD ARD', or RICHMOND HILL, NEW YORK; SAID GODDARD assxenoa, BY MEs'NE As SIGNMDNTS QJQHN FRANCIS CHEVAL'IEBGJQF naooxtmn, MASSACHUSETTS; V

" WIRE-CUTTING MECHANISM.

' Application nle d October 22,

Ourpresent application isv a continuation inpart of our United States patent application, filed May 12, 1922, SerialgNo. 560,- 481, flexible-shingle wiring machine, now United States Patent No. 1,571,582, granted February 2,1926. v

Our invention has reference. to an 1111- provement in wire cutting mechanism as applied to machines for manufacturing flexibleshingles and more particularly to an improvement in such a machine for manu facturing flexible shingles, being the same as shown in United States Patent No. 1,274,

410, granted August 6, 1918, to Albert Abbe Griswold, one of the present joint inventors. The object of our invention is to improve;

the construction of a flexible shingle wiring machine and more particularly to 1 mprove the construction of the wire cutting niechanismofsuch machines.

Our invention consistsin the peculiar and novel construction of a flexible shinglewiringmachine andimore particularly to an i improvement inthe wire cutting mechanism of a flexible shingle Wiring machine, said Vwire cutting mechanism having details of construction for cutting a wire a predeteri' mined length for a wire staple, as will be more fully set forth hereinafter and claimed. i The figures in the drawings illustrate our improved wirecutting mechanism and show adjacent portions of the flexibleshingle wir v ing machine, so that those skilled in the will, understand thesame, the m jorfpor I United States ferred to. Y l V, Figure 1 is a detail vertical sectional vlew tion of the-machine being shownin our patent application above re-1 through the wire feed mechanism and the principal parts ofthe-"wirecutting mecha- Figure 2' is a still further enlargeddetail sectional viewof that part of the Wire feed imechanism that into the machine. V I i j Figure 3 is an enlarged detail verticalsec- 3 grips V and feeds the? wire I tionalview similar to Figure 1 showing more D 7 tach'ing in detail the means forloperating the wir i cutting'mechams'm, andv a v F'gure 4 is a still further enlarged detail face View of the wire cutting plate, the-atportion ofthe staple forming slide being shownin section. v Inthe drawings Aindicates a portion of 1924; Serial No. 745,150.12,

.theltrame of the machine, B a crankin' the driving mechanism, G" the wire feedfmecha nism', D the wire cutting mechanism, E part of the staple forming mechanism slide and p F the wire. 1

All of the'machi'n'e not shown in the drawings'is the same as shown inour i United States patent application referred to and which op'eratesas'follows: Agdepre'ssio n of A afoottreadle will through a clutch operat 7 ing mechanism allow the drivingmechanism to operate, so that the machine will ,make

operation of the foottreadlefi I The wire; feed 1mechanism,C consists ofzvl. V 0, p

crank B onthe ,driving shaft operatively one complete operation and-stop, for each connected with a horizontal bar 9 which in turn is operatilely C nected to a vertical 7' lever 10fon the rearre'nd' of ashaft '11 in bearings 12, 12, in a bracket"- 13, on the frame A. On the forwardiend of the shaft 11 isa vertical lever ,14" operatively con a wire gripping j aw 20'.and whichisipivotal ly secured "to vertical armsionthejslide, 1,5','

the machine. On the frame extension-'lfi-to the right of the slide 15 isa block 21:and-

a spring operated'wire gripping jaw 22 which allows a free inward movement of asshowninFigure 5L. flhe 'wire' isfgrippedi between thewi're gripping jaw;20} and the topof, the fsl'ide '15,to feed thewire F into' A the/wire and also prevents a-rret'rofgrade A movement of j the wireF." T0; the-,rightof i the block; 21f and rotatably supported V A bearingson tliel frame-extension 16 is {a series of wire 1 straightening; rolls 23, 23, On

the .end of the extension 16; iswpivotally se a grooved pulley 27. The wire comes cured a. normally, horifz'ontal armv 24 11aviiig a bent; inner stop 'end 25" and a bifurcatedouter fend,-26 'inowhich is, pivotally secured) from a source of supply, not shown, under j thepulley "27, I through. the straightening I 'rolls23,-2 3, under the Wire gripping jaws 22and'2O andthen through my; improved .1 410a 7:

wire cutting mechanism D. 1

The/eta le formm mechanlsm' SlIClQ- E has a vertical sliding movement in theflfraine I "A, and up and down movement for each op- 1 L tom lugs 29 and trained has vertical guide-ways 31, 31, as

eration'o'f the machine and it is constructed to have a recess 28 formed by top and hot- 30 respeetwely and the recess '28 in the staple torn'iing mechanism sllde ottl e staple forming mechanisn'r and this plate has a comparatively large round central hole 530 the circular edge of which forms the wire cutting edge of the member. l

ln'the operation of the tieribl'e'shingle wiringmaehine having our improved wire inovement of the root trez the first downward die, by the loot oi the operator, causes the driving mechanism to be brought into operation to close the clutch members on the driving-shalt and the pulley; The driving shai't now makes one complete revolution and then stops. In this first revolution of the 7 driving shaft the wire feed mechanism C mined length of the wire in into the machine. The operation of the wire feed mechanism is as follows. in each revolution ot'the d -iving shaft the cranlr B through the horizontal bar 9, the vertical lever 10, the shaft 11, the vertical leverflet, the slide 15, the arm 17, the lever 18, I the wire gripping member '19 and the wire gripping jaw 20, operates the slide 15 to draw the slide towards the machine. 111 i this movement oi? the slide 15 the wire" F is gripped between the slid'elS and the gripping jaw 20', and the Wire F is fed into themachinetherequired length .501" each revolution oi the driving shaft. jirs th'ewire E is intermittently fed cutting mechanism,

into the machine trein'ja source oisupply,

not shown, it comes under the grooved pulley 27 then between the straightening rolls 23, 23, which straightens the wire and the wire thengoes between the'hlock 21 and the spring operated wire gripping jaw 22. This wire gripping jaw is shaped so as to allow a .tree'passage or machine. When the inward movement of the wire stops the wire tomatically grips the wirebe'tween the wire gripping jaw 22 and the top. of theblock 21, which is fast to the tran'ieextension 16, and prevents a retrograde inovei'nent oi the wiref feeds a predetep the wire into the wire F is fed through the small flat bore 33 a predetermined length, by the wire feed mechanism C and the staple forming inechanisln slide E is given an up and down movell'lOIlil by the mechanism of the machine,t0r

each complete operation oi the machine and by'the shearing action of the squared off end of the hardened steel bushings 32 and the circular eutting edge of theround central hole 86 in the hardened steel plate 35, the required'length of the wire is cut on. By this construction downward movement or the plate 35-causes thevupper eurvededge of the cutting hole 36, to cut' downward through the flat wire i and the upward movement of the plate causes the lower curved edge of the cutting hole 36, to cut upward through the fiat wire F, thereby leaving aclean cut end on the wire F, with out burring the end-of the wire. liaving thus described our invention weclaim as new 2 v V 1. A wire cutting mechanism comprising a hardened tubular steel wire cutting bushing secured in the frame of a machine and having asmall flat wire bore and a squared on wire cutting end, a hat cutting plate having a comparatively large round cutting aperture, the circular edge of the aperture t'orn'iing a-cont-inuous cuttings larger than the small flat wire bore oi the cutting bushing and secured to a slide oi Elie machine and bearing "against the; squared oil wire cutting end or the wire cutting bushing, said slide having up and down moven'ients for the purpose as described.

A; wirecutting mechanism cen'iprising a hardened tubular steel wire cutting bi'ishing secured in the frame of amachii'ie and having ttSlIli'llli'ltth wire bore and a squared oil wire cutting end, a fiat cutting plate secured-{to slide of the machine and hearing against the squared oil wire cuttingend of the wire cutting lJI1Sl1lIIg,S&i(l l'lat cutting plate having a comparatively large circular ivire cutting openlng, the upper curved cut ting edge otwvhieh coa cting with the lower fiat edge'oi 'th'e fiat wire bore in'the bushing and the lower curved cutting edge of which coasting with the upperflat edge of-the flat wire bore in the bushing, forms the wire cutting edges ot the wire cutting mechanism,

said slide having up and down movements for the purpose as described.

In testimony'whereof, we have signed our names to this specification. 1 ALBERT ABBE GRlSl VOLDf ALVIN CARROLL GODDARD. 

